DUNGS MBC-300-SE-S02 gas multibloc

DUNGS MBC-300-SE-S02 GAS MULTIBLOC

Due to the increasing demand of gas burners for modulating operation, the demand for suitable gas/
air ratio control systems is more and more the focus of discussions.
In this context, a high modulation range for burners is required.
For many years, DUNGS has been supplying compact controlss (MB – VEF and DMV – VEF) which
are equipped with gas/air ratio control units.
The DUNGS gas/air ratio control system requires no additional power for the control function.
The forced air pressure Pair is the key parameter to control the gas/air ratio control system.
The control controls a gas pressure which is proportional to the forced air pressure via an adjustable
ratio V so that the gas volume corresponds to the current combustion air volume.
The controls can also be used for a two-stage floating operation.
These controls have a compact design comprising the following functional elements:
– 2 solenoid valves (Class A)
– Pressure controller in double-seat technology, located on the axis of the first solenoid valve (inlet
side)
– Servo pressure control unit controlling the pressure controller without any additional power
– Ratio setting V = Pburner / Pair, 0.75 : 1 to 3 : 1
– Zero point correction
– Dirt trap or premount filter
– Pressure limiter
– Pulse flange (for threaded versions)
Additionally, DUNGS provides microprocessors equipped with controlled automatic burner controls
comprising integrated fuel/air ratio control systems of types MPA or BCS. They can also be combined with a pneumatic ratio control system.

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